#include <fstream>
#include <vector>
using namespace std;
ifstream cin("sortaret.in");
ofstream cout("sortaret.out");
vector <int> g[50001];
int v[50001],rez[50001],k,ok[50001];
void elim(int nod)
{
    ok[nod]=1;
    rez[++k]=nod;
    for(auto x:g[nod])
    {
        v[x]--;
        if(v[x]==0)
            elim(x);
    }
}
int main()
{
    int n,m,i,x,y;
    cin>>n>>m;
    for(i=1;i<=m;i++)
    {
        cin>>x>>y;
        g[y].push_back(x);
        v[x]++;
    }
    for(i=1;i<=n;i++)
    {
        if(v[i]==0&&ok[i]==0)
        {
            elim(i);
        }
    }
    for(i=n;i>=1;i--)
        cout<<rez[i]<<" ";
    return 0;
}